Listings Analyzed
65
33 boolean features tested
Median EUR/m2
5,812
baseline for comparisons
Best Premium
+841
Open Kitchen
Largest Discount
-923
Pipe Reno — Upcoming

This page analyzes 65 apartment listings in Kallio to identify which features are associated with higher or lower asking prices per square meter. Three complementary methods are used: direct median comparisons for yes/no features, rank correlations for numeric features, and a Ridge regression model that estimates each feature's independent contribution while controlling for the others.

The clearest price signals come from upcoming renovation liabilities. Pipe Reno — Upcoming (-923 EUR/m2), Entrance Hall (-892 EUR/m2), Courtyard View (-654 EUR/m2) show statistically significant discounts -- their 95% confidence intervals are entirely below zero. This makes intuitive sense: upcoming major works signal future costs for the buyer. Among numeric features, Condition Score has the strongest correlation with price (Spearman r=0.45, p<0.001). The Ridge model confirms this: condition and floor number are the only features whose effects remain significant after controlling for everything else.

Most features show wide confidence intervals -- with 65 listings, many effects are suggestive but not yet conclusive. Faded bars and faded table rows indicate where the CI crosses zero. As the dataset grows (~30 new listings/month), these estimates will tighten.

Ridge Model Effects (approx % per 1 SD)

Ridge regression on log(EUR/m2), alpha=1.0 · R2 = 0.414 · N = 55 · Faded rows: CI crosses zero

Feature Effect 95% CI
Condition Score ▲ +4.9% [+1.5, +8.1]
Pipe Reno — Upcoming ▼ -3.2% [-5.3, -0.4]
Facade Reno — Done ▼ -3.1% [-6.5, +0.6]
Floor Number ▲ +3.1% [+0.7, +5.7]
Building Age (years) ▲ +1.9% [-1.3, +4.3]
Pipe Reno — Done ▲ +1.5% [-1.7, +4.5]
Bathroom Reno — Done ▼ -1.4% [-4.1, +1.9]
Elevator ▲ +1.3% [-0.7, +2.9]
Size (m²) ▲ +1.2% [-1.7, +4.2]
Facade Reno — Upcoming ▼ -0.9% [-3.8, +1.8]
Roof Reno — Upcoming ▲ +0.9% [-1.9, +3.1]
Maintenance Fee (EUR/mo) ▼ -0.8% [-3.4, +1.9]
Bathroom Reno — Upcoming ▼ -0.7% [-2.9, +1.6]
Original Condition (keyword) ▲ +0.6% [-2.4, +3.5]
Roof Reno — Done — +0.5% [-1.9, +2.8]
Building Sauna (shared) — +0.3% [-3.0, +2.8]
Balcony — +0.1% [-2.9, +2.3]
Renovated (keyword) — +0.1% [-3.2, +2.5]
Kitchen Reno — Done — +0.0% [-3.8, +3.0]

Coefficients show approximate % change in EUR/m2 per 1 standard deviation change in each feature. Based on 55 listings with complete data. Bootstrap 500x for CIs. Sample size is growing ~30/month.